US20110029703A1 - Electronic device capable of automatically switching between a master mode and a slave mode - Google Patents
Electronic device capable of automatically switching between a master mode and a slave mode Download PDFInfo
- Publication number
- US20110029703A1 US20110029703A1 US12/699,899 US69989910A US2011029703A1 US 20110029703 A1 US20110029703 A1 US 20110029703A1 US 69989910 A US69989910 A US 69989910A US 2011029703 A1 US2011029703 A1 US 2011029703A1
- Authority
- US
- United States
- Prior art keywords
- master
- slave
- output port
- pin
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
Definitions
- the present disclosure relates to electronic devices and, particularly, to an electronic device capable of automatically switching between a master and a slave mode.
- an electronic device has at least two control modes, for example, a master mode and a slave mode.
- a master mode When the electronic device, such as digital photo frame (DPF), is connected with a computer, the electronic device enters the slave mode, in which the DPF is controlled by the computer; when the DFP is connected with a memory device, such as a flash memory, the DPF enters the master mode, in which the DPF controls the flash memory.
- a memory device such as a flash memory
- a present switching circuit of the electronic device to switch between the master mode and the slave mode usually is relatively complex and has a high cost.
- an electronic device capable of automatically switching between a master mode and a slave mode is desired to overcome the above-described deficiencies.
- FIG. 1 is a block diagram of an electronic device capable of automatically switching between a master mode and a slave mode.
- FIG. 2 is a circuit diagram of an electronic device capable of automatically switching between a master mode and a slave mode of FIG. 1 .
- FIG. 1 is a block diagram of an electronic device capable of automatically selecting between a master mode and a slave mode.
- the electronic device 1 includes a mode switching circuit 10 and a USB interface 20 .
- the USB interface 20 is used for connecting an external electronic device 2
- the mode switching circuit 10 is used for detecting the type of the external electronic device 2 and switching the electronic device 1 to the master mode or the slave mode according to the detected type of the external electronic device 2 .
- the mode switching circuit 10 switches the electronic device 1 to the slave mode, when the external electronic device 2 is a host device, such as a computer.
- the switching circuit 10 switches the electronic device 1 to the master mode.
- the mode switching circuit 10 includes a master-slave selection triggering circuit 101 , a controlling unit 102 , a selection circuit 103 , and a switching circuit 104 .
- the master-slave selection triggering circuit 101 includes an input port 1011 , a first output port 1012 , and a second output port 1013 .
- the USB interface 20 includes a power pin 201 and a data pin 202 .
- the input port 1011 of the master-slave selection triggering circuit 101 is connected to the power pin 201 of the USB interface 20 .
- the first output port 1012 of the master-slave selection triggering circuit 101 is connected to the controlling unit 102 , and the second output port 1013 of the master-slave selection triggering circuit 101 , which is connected to the selection circuit 103 .
- the electronic device 1 also includes a processing unit 30 and a power source 40 .
- the processing unit 30 includes a slave mode controlling pin 301 and a master mode controlling pin 302 .
- the master-slave selection triggering circuit 101 determines the type of external electronic devices 2 by detecting the voltage of the power pin 201 of the USB interface 20 .
- the master-slave selection triggering circuit 101 detects the power pin 201 is at high voltage.
- the master-slave selection triggering circuit 101 determines the external electronic device 2 is a host device and sends a slave triggering signal to the controlling unit 102 and the selection circuit 103 via the first output port 1012 and the second output port 1013 respectively.
- the master-slave selection triggering circuit 101 detects the power pin 201 is at low voltage
- the master-slave selection triggering circuit 101 determines the external electronic device 2 is a slave device. Then the master-slave selection triggering circuit 101 sends a master triggering signal to the controlling unit 102 and the selection circuit 103 via the first output port 1012 and the second output port 1013 respectively.
- the controlling unit 102 is further connected to the switching circuit 104 , and the switching circuit 104 is connected between the power source 40 and the power pin 201 .
- the controlling unit 102 receives the slave triggering signal from the first output port 1012
- the controlling unit 102 switches off the switching circuit 104 , then disconnects the connection between the power source 40 and the power pin 201 .
- the selection circuit 103 receives the slave triggering signal from the second output port 1013
- the selection circuit 103 connects the slave mode controlling pin 301 of the processing unit 30 with the data pin 202 . Therefore, the electronic device 1 works in the slave mode.
- the controlling unit 102 When the controlling unit 102 receives the master triggering signal from the first output port 1012 , the controlling unit 102 switches on the switching circuit 104 , then the power source 40 is electrically connects to the power pin 201 via the switching circuit 104 and provides power to the power pin 201 .
- the selection circuit 103 receives the master triggering signal from the second output port 1013 , the selection circuit 103 connects the master mode controlling pin 302 of the processing unit 30 with the data pin 202 . Therefore, the electronic device 1 works in the master mode.
- the controlling unit 102 of the electronic devices 1 switches off the switching circuit 104 to disconnect the connection between the power source 40 and the power pin 201 .
- the selection circuit 103 of the electronic device 1 connects the slave mode controlling pin 301 with the data pin 20 , then the electronic device 1 is switched to the slave mode.
- the controlling unit 102 of the electronic devices 1 switches on the switching circuit 104 to connect the power source 40 with the power pin 201 , and the power source 40 provides power to the power pin 201 .
- the selection circuit 103 of the electronic device 1 connects the master mode controlling pin 302 with the data pin 20 , then the electronic device 1 is switched to the master mode.
- FIG. 2 is a circuit diagram of the electronic device of FIG. 1 .
- the master-slave selection triggering circuit 101 [Zi] includes a first resistor R 1 , a second resistor R 2 , and a third resistor R 3 .
- a connection node A between the first resistor R 1 and the second resistor R 2 serves as the input port 1011 of the master-slave selection triggering circuit 101 .
- a node B between the resistor R 1 and the controlling unit 102 serves as the output port 1012 of the master-slave selection triggering circuit 101
- a connection node C between the first resistor R 2 and the second resistor R 3 serves as the output port 1013 of the master-slave selection triggering circuit 101 .
- the controlling unit 102 is a high voltage activated switch, and the controlling unit 102 includes a control terminal, a first conductive terminal, and a second conductive terminal.
- the exemplary embodiment takes a negative-positive-negative (NPN) bipolar junction transistor (BJT) Q 1 as an example to illustrate the controlling unit 102 .
- NPN negative-positive-negative
- BJT bipolar junction transistor
- a base, an emitter, and a collector of the NPN BJT Q 1 serve as the control terminal, the first conductive terminal, and the second conductive terminal of the controlling unit 102 respectively.
- the base of the NPN BJT Q 1 is connected to the first output port 1012 of the master-slave selection triggering circuit 101 , the collector of the NPN BJT Q 1 is connected to the switching circuit 104 , and the emitter of the NPN BJT Q 1 is connected to ground.
- the switching circuit 104 is a high voltage activated circuit, and the switching circuit 104 includes a control terminal, a first conductive terminal, and a second conductive terminal.
- the control terminal of the switching circuit 104 is connected to the collector of the NPN BJT Q 1 , the first conductive terminal is connected to the power source 40 , and the second conductive terminal is connected to the power pin 201 .
- the switching circuit 104 is a high voltage activated switch, such as an n-channel metal-oxide-semiconductor field-effect transistor (NMOSFET) or a NPN BJT.
- NMOSFET n-channel metal-oxide-semiconductor field-effect transistor
- the slave mode controlling pin 301 of a processing unit 30 includes a “Device D+” pin and a “Device D ⁇ ” pin
- the master mode controlling pin 302 of a processing unit 30 includes a “Host D+” pin and a “Host D ⁇ ” pin
- the data pin 202 of the USB interface 20 includes a first data pin (D+ pin) and a second data pin (D ⁇ pin).
- the selection circuit 103 is a double-pole double-throw switch, which includes a control terminal, two public terminals, and four joint terminals.
- the control terminal of the selection circuit 103 is connected to the second output port 1013 of the master-slave selection triggering circuit 101 .
- the two public terminals of the selection circuit 103 are respectively connected to the first data pin and the second data pin of the data pin 202 .
- the four joint terminals of the selection circuit 103 are respectively connected to the “Device D+” pin, “Device D ⁇ ” pin, “Host D+” pin, “Host D ⁇ ” pin.
- the two public terminals are connected to the joint terminals, which are connected to the “Device D+” pin, “Device D ⁇ ” pin.
- the control terminal of the selection circuit 103 is at low voltage, the two public terminals are connected to the joint terminals, which are connected to the “Host D+” pin, “Host D ⁇ ” pin.
- the power pin 201 of the USB interface 20 receives a high voltage from the external device 2
- the input port 1011 receives a high voltage from the USB interface 20 accordingly.
- the output port 1012 receives a high voltage from the input port 1011 via resistor R 1
- the control terminal of the NPN BJT Q 1 receives a high voltage from the first output port 1012 , thereby causing the NPN BJT Q 1 to be switched on.
- the control terminal of the switching circuit 104 receives a low voltage from the NPN BJT Q 1 , the switching circuit 104 is switched off accordingly, and the connection between the power source 40 and the power pin 201 of the USB interface 20 is disconnected.
- the second output 1013 When the input port 1011 receives a high voltage from the USB interface 20 , the second output 1013 receives a high voltage divided by resistor R 2 and resistor R 3 , then the second output 1013 outputs a high voltage slave triggering signal to the selection circuit 103 .
- the selection circuit 103 connects the “Device D+” pin and “Device D ⁇ ” pin to the first data pin and second data pin of the USB interface 20 by connecting the two public terminals to the joint ends connected to the “Device D+” pin, “Device D ⁇ ” pin.
- the power supply of the USB interface 20 is from the external electronic device 2 , and the electronic device 1 is switched to the slave mode.
- the power pin 201 of the USB interface 20 receives a low voltage from the external device 2
- the input port 1011 receives a low voltage from the power pin 201 accordingly.
- the output port 1012 receives a low voltage from the input port 1011 via resistor R 1
- the control terminal of the NPN BJT Q 1 receives a low voltage from the output port 1012
- the NPN BJT Q 1 is switched off.
- the control terminal of the switching circuit 104 receives a high voltage from the NPN transistor Q 1 , the switching circuit 104 is switched on, and the power source 40 is connected to the power pin 201 of the USB interface 20 .
- the second output 1013 When the input port 1011 receives a low voltage from the USB interface 20 , the second output 1013 receives a low voltage divided by resistor R 2 and resistor R 3 then the second output 1013 outputs a low voltage master triggering signal to the selection circuit 103 .
- the selection circuit 103 connects the “Device D+” pin and “Device D ⁇ ” pin separately to the first data pin and second pin of the USB interface 20 by connecting the two public terminals to the joint ends connected to the “Host D+” pin, “Host D ⁇ ” pin.
- the power supply of the USB interface 20 is from the electronic device 1 , and the electronic device 1 is switched to the master mode.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Sources (AREA)
Abstract
Description
- 1. Technical Field
- The present disclosure relates to electronic devices and, particularly, to an electronic device capable of automatically switching between a master and a slave mode.
- 2. Description of Related Art
- In general, an electronic device has at least two control modes, for example, a master mode and a slave mode. When the electronic device, such as digital photo frame (DPF), is connected with a computer, the electronic device enters the slave mode, in which the DPF is controlled by the computer; when the DFP is connected with a memory device, such as a flash memory, the DPF enters the master mode, in which the DPF controls the flash memory. There is a need to change the control mode when the DPF connects to different external device.
- However, a present switching circuit of the electronic device to switch between the master mode and the slave mode usually is relatively complex and has a high cost.
- Therefore, an electronic device capable of automatically switching between a master mode and a slave mode is desired to overcome the above-described deficiencies.
- The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the electronic device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views
-
FIG. 1 is a block diagram of an electronic device capable of automatically switching between a master mode and a slave mode. -
FIG. 2 is a circuit diagram of an electronic device capable of automatically switching between a master mode and a slave mode ofFIG. 1 . -
FIG. 1 is a block diagram of an electronic device capable of automatically selecting between a master mode and a slave mode. The electronic device 1 includes amode switching circuit 10 and aUSB interface 20. TheUSB interface 20 is used for connecting an externalelectronic device 2, and themode switching circuit 10 is used for detecting the type of the externalelectronic device 2 and switching the electronic device 1 to the master mode or the slave mode according to the detected type of the externalelectronic device 2. For example, themode switching circuit 10 switches the electronic device 1 to the slave mode, when the externalelectronic device 2 is a host device, such as a computer. When theexternal device 2 is a slave device, such as a flash memory, theswitching circuit 10 switches the electronic device 1 to the master mode. - The
mode switching circuit 10 includes a master-slaveselection triggering circuit 101, a controllingunit 102, aselection circuit 103, and aswitching circuit 104. The master-slaveselection triggering circuit 101 includes aninput port 1011, afirst output port 1012, and asecond output port 1013. TheUSB interface 20 includes apower pin 201 and adata pin 202. Theinput port 1011 of the master-slaveselection triggering circuit 101, is connected to thepower pin 201 of theUSB interface 20. Thefirst output port 1012 of the master-slaveselection triggering circuit 101, is connected to the controllingunit 102, and thesecond output port 1013 of the master-slaveselection triggering circuit 101, which is connected to theselection circuit 103. - The electronic device 1 also includes a
processing unit 30 and apower source 40. Theprocessing unit 30 includes a slavemode controlling pin 301 and a mastermode controlling pin 302. - When the external
electronic device 2 connects to theUSB interface 20, the master-slaveselection triggering circuit 101 determines the type of externalelectronic devices 2 by detecting the voltage of thepower pin 201 of theUSB interface 20. When the master-slaveselection triggering circuit 101 detects thepower pin 201 is at high voltage. The master-slaveselection triggering circuit 101 determines the externalelectronic device 2 is a host device and sends a slave triggering signal to the controllingunit 102 and theselection circuit 103 via thefirst output port 1012 and thesecond output port 1013 respectively. When the master-slaveselection triggering circuit 101 detects thepower pin 201 is at low voltage, the master-slaveselection triggering circuit 101 determines the externalelectronic device 2 is a slave device. Then the master-slaveselection triggering circuit 101 sends a master triggering signal to the controllingunit 102 and theselection circuit 103 via thefirst output port 1012 and thesecond output port 1013 respectively. - The controlling
unit 102 is further connected to theswitching circuit 104, and theswitching circuit 104 is connected between thepower source 40 and thepower pin 201. When the controllingunit 102 receives the slave triggering signal from thefirst output port 1012, the controllingunit 102 switches off theswitching circuit 104, then disconnects the connection between thepower source 40 and thepower pin 201. When theselection circuit 103 receives the slave triggering signal from thesecond output port 1013, theselection circuit 103 connects the slavemode controlling pin 301 of theprocessing unit 30 with thedata pin 202. Therefore, the electronic device 1 works in the slave mode. - When the controlling
unit 102 receives the master triggering signal from thefirst output port 1012, the controllingunit 102 switches on theswitching circuit 104, then thepower source 40 is electrically connects to thepower pin 201 via theswitching circuit 104 and provides power to thepower pin 201. When theselection circuit 103 receives the master triggering signal from thesecond output port 1013, theselection circuit 103 connects the mastermode controlling pin 302 of theprocessing unit 30 with thedata pin 202. Therefore, the electronic device 1 works in the master mode. - Therefore, when the external
electronic device 2 is a host device, such as a computer, the controllingunit 102 of the electronic devices 1 switches off theswitching circuit 104 to disconnect the connection between thepower source 40 and thepower pin 201. At the same time, theselection circuit 103 of the electronic device 1 connects the slavemode controlling pin 301 with thedata pin 20, then the electronic device 1 is switched to the slave mode. When the externalelectronic device 2 is a slave device, the controllingunit 102 of the electronic devices 1 switches on theswitching circuit 104 to connect thepower source 40 with thepower pin 201, and thepower source 40 provides power to thepower pin 201. At the same time, theselection circuit 103 of the electronic device 1 connects the mastermode controlling pin 302 with thedata pin 20, then the electronic device 1 is switched to the master mode. -
FIG. 2 is a circuit diagram of the electronic device ofFIG. 1 . The master-slaveselection triggering circuit 101 [Zi] includes a first resistor R1, a second resistor R2, and a third resistor R3. Referring toFIG. 2 , a connection node A between the first resistor R1 and the second resistor R2 serves as theinput port 1011 of the master-slaveselection triggering circuit 101. A node B between the resistor R1 and the controllingunit 102 serves as theoutput port 1012 of the master-slaveselection triggering circuit 101, and a connection node C between the first resistor R2 and the second resistor R3 serves as theoutput port 1013 of the master-slaveselection triggering circuit 101. - The controlling
unit 102 is a high voltage activated switch, and the controllingunit 102 includes a control terminal, a first conductive terminal, and a second conductive terminal. The exemplary embodiment, takes a negative-positive-negative (NPN) bipolar junction transistor (BJT) Q1 as an example to illustrate the controllingunit 102. A base, an emitter, and a collector of the NPN BJT Q1 serve as the control terminal, the first conductive terminal, and the second conductive terminal of the controllingunit 102 respectively. - The base of the NPN BJT Q1 is connected to the
first output port 1012 of the master-slaveselection triggering circuit 101, the collector of the NPN BJT Q1 is connected to theswitching circuit 104, and the emitter of the NPN BJT Q1 is connected to ground. - The
switching circuit 104 is a high voltage activated circuit, and theswitching circuit 104 includes a control terminal, a first conductive terminal, and a second conductive terminal. The control terminal of theswitching circuit 104 is connected to the collector of the NPN BJT Q1, the first conductive terminal is connected to thepower source 40, and the second conductive terminal is connected to thepower pin 201. In the exemplary embodiment, theswitching circuit 104 is a high voltage activated switch, such as an n-channel metal-oxide-semiconductor field-effect transistor (NMOSFET) or a NPN BJT. - In the exemplary embodiment, the slave
mode controlling pin 301 of aprocessing unit 30 includes a “Device D+” pin and a “Device D−” pin, the mastermode controlling pin 302 of aprocessing unit 30 includes a “Host D+” pin and a “Host D−” pin. Thedata pin 202 of theUSB interface 20 includes a first data pin (D+ pin) and a second data pin (D− pin). - The
selection circuit 103 is a double-pole double-throw switch, which includes a control terminal, two public terminals, and four joint terminals. The control terminal of theselection circuit 103 is connected to thesecond output port 1013 of the master-slaveselection triggering circuit 101. The two public terminals of theselection circuit 103 are respectively connected to the first data pin and the second data pin of thedata pin 202. The four joint terminals of theselection circuit 103 are respectively connected to the “Device D+” pin, “Device D−” pin, “Host D+” pin, “Host D−” pin. When the control terminal of theselection circuit 103 is at high voltage, the two public terminals are connected to the joint terminals, which are connected to the “Device D+” pin, “Device D−” pin. When the control terminal of theselection circuit 103 is at low voltage, the two public terminals are connected to the joint terminals, which are connected to the “Host D+” pin, “Host D−” pin. - When the external
electronic device 2 connected to the electronic device 1 is the host device, thepower pin 201 of theUSB interface 20 receives a high voltage from theexternal device 2, and theinput port 1011 receives a high voltage from theUSB interface 20 accordingly. Theoutput port 1012 receives a high voltage from theinput port 1011 via resistor R1, and the control terminal of the NPN BJT Q1 receives a high voltage from thefirst output port 1012, thereby causing the NPN BJT Q1 to be switched on. The control terminal of theswitching circuit 104 receives a low voltage from the NPN BJT Q1, theswitching circuit 104 is switched off accordingly, and the connection between thepower source 40 and thepower pin 201 of theUSB interface 20 is disconnected. - When the
input port 1011 receives a high voltage from theUSB interface 20, thesecond output 1013 receives a high voltage divided by resistor R2 and resistor R3, then thesecond output 1013 outputs a high voltage slave triggering signal to theselection circuit 103. Theselection circuit 103 connects the “Device D+” pin and “Device D−” pin to the first data pin and second data pin of theUSB interface 20 by connecting the two public terminals to the joint ends connected to the “Device D+” pin, “Device D−” pin. - Therefore, the power supply of the
USB interface 20 is from the externalelectronic device 2, and the electronic device 1 is switched to the slave mode. - When the external
electronic device 2 connected to the electronic device 1 is the slave device, thepower pin 201 of theUSB interface 20 receives a low voltage from theexternal device 2, and theinput port 1011 receives a low voltage from thepower pin 201 accordingly. Theoutput port 1012 receives a low voltage from theinput port 1011 via resistor R1, the control terminal of the NPN BJT Q1 receives a low voltage from theoutput port 1012, and the NPN BJT Q1 is switched off. The control terminal of theswitching circuit 104 receives a high voltage from the NPN transistor Q1, theswitching circuit 104 is switched on, and thepower source 40 is connected to thepower pin 201 of theUSB interface 20. - When the
input port 1011 receives a low voltage from theUSB interface 20, thesecond output 1013 receives a low voltage divided by resistor R2 and resistor R3 then thesecond output 1013 outputs a low voltage master triggering signal to theselection circuit 103. Theselection circuit 103 connects the “Device D+” pin and “Device D−” pin separately to the first data pin and second pin of theUSB interface 20 by connecting the two public terminals to the joint ends connected to the “Host D+” pin, “Host D−” pin. - Therefore, the power supply of the
USB interface 20 is from the electronic device 1, and the electronic device 1 is switched to the master mode. - It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the present disclosure.
Claims (7)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910304969.7 | 2009-07-29 | ||
CN200910304969 | 2009-07-29 | ||
CN2009103049697A CN101989246A (en) | 2009-07-29 | 2009-07-29 | Electronic device capable of automatically switching master and slave equipment modes of universal serial bus (USB) |
Publications (2)
Publication Number | Publication Date |
---|---|
US20110029703A1 true US20110029703A1 (en) | 2011-02-03 |
US8095714B2 US8095714B2 (en) | 2012-01-10 |
Family
ID=43528058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/699,899 Expired - Fee Related US8095714B2 (en) | 2009-07-29 | 2010-02-04 | Electronic device capable of automatically switching between a master mode and a slave mode |
Country Status (2)
Country | Link |
---|---|
US (1) | US8095714B2 (en) |
CN (1) | CN101989246A (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110084651A1 (en) * | 2009-10-08 | 2011-04-14 | Audiovox Corporation | Charging station |
US20110227535A1 (en) * | 2010-03-22 | 2011-09-22 | Audiovox Corporation | Charge clip |
CN102841877A (en) * | 2012-07-05 | 2012-12-26 | 深圳芯邦科技股份有限公司 | Detecting method and automatic detecting circuit of working mode |
WO2013006753A1 (en) * | 2011-07-07 | 2013-01-10 | Voxx International Corporation | Current selectable usb charger |
US20130326094A1 (en) * | 2010-11-24 | 2013-12-05 | Shanghai Actions Semiconductor Co., Ltd. | Usb device and detection method thereof |
US20140180618A1 (en) * | 2012-12-22 | 2014-06-26 | Hon Hai Precision Industry Co., Ltd. | Test device for testing startup function of electronic device |
US20140183974A1 (en) * | 2012-12-27 | 2014-07-03 | Wayne L. Proefrock | Universal power interface |
WO2015059654A1 (en) * | 2013-10-22 | 2015-04-30 | Allgo Embedded Systems Private Limited | Universal serial bus (usb) hub for switching downstream ports between host mode and slave mode |
USD734253S1 (en) | 2012-01-09 | 2015-07-14 | Voxx International Corporation | Housing for a USB wall plate charger |
US9166434B2 (en) | 2012-06-29 | 2015-10-20 | Intel Corporation | Universal charger |
US9184627B2 (en) | 2012-12-28 | 2015-11-10 | Intel Corporation | Charging system for electronic device |
US9188325B2 (en) | 2012-01-09 | 2015-11-17 | Voxx International Corporation | Travel nightlight with USB charger |
US9281699B2 (en) | 2012-12-27 | 2016-03-08 | Intel Corporation | Electronic device to be powered by alternative power source |
EP3016363A4 (en) * | 2013-06-26 | 2017-02-08 | Huizhou TCL Mobile Communication Co., Ltd. | Communication module and terminal for realizing hot plug |
US20170039155A1 (en) * | 2015-08-07 | 2017-02-09 | Xiaomi Inc. | Interface circuit, method and device for state switching |
US20170177530A1 (en) * | 2015-12-21 | 2017-06-22 | Xiaomi Inc. | Method and apparatus for switching state |
US20180121373A1 (en) * | 2015-04-23 | 2018-05-03 | Zte Corporation | Circuit, Method and Apparatus for USB Interface Sharing |
US10162788B2 (en) * | 2016-08-19 | 2018-12-25 | Microchip Technology Incorporated | USB on the go (OTG) multi-hub endpoint reflector hub |
CN109344016A (en) * | 2018-08-31 | 2019-02-15 | 珠海全志科技股份有限公司 | Can the USB device switched between host and equipment mode and switching method |
US20200212640A1 (en) * | 2018-12-26 | 2020-07-02 | Dexin Electronic Ltd. | Peripheral device |
US10714958B2 (en) | 2018-08-17 | 2020-07-14 | Chicony Power Technology Co., Ltd. | Charging apparatus and operating method thereof |
US11128126B2 (en) * | 2019-01-17 | 2021-09-21 | Hongfujin Precision Electronics (Zhengzhou) Co., Ltd. | Internal voltage-canceling circuit and USB device using the same |
US11137932B2 (en) * | 2019-12-02 | 2021-10-05 | Western Digital Technologies, Inc. | Pad indication for device capability |
CN113505089A (en) * | 2021-07-27 | 2021-10-15 | 联想(北京)有限公司 | Electronic equipment and control method |
CN114064535A (en) * | 2021-11-15 | 2022-02-18 | 深圳市闪芯微电子有限公司 | USB chip and manufacturing method thereof |
US11611452B2 (en) * | 2018-05-04 | 2023-03-21 | Continental Automotive Gmbh | Gateway for data communication in a vehicle |
CN117827716A (en) * | 2024-02-28 | 2024-04-05 | 苏州元脑智能科技有限公司 | Master-slave switching interface structure of server and application equipment thereof |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9232265B2 (en) * | 2011-03-31 | 2016-01-05 | Lattice Semiconductor Corporation | Method, apparatus and system for transitioning an audio/video device between a source mode and a sink mode |
CN103139031A (en) * | 2011-12-02 | 2013-06-05 | 亚旭电子科技(江苏)有限公司 | Universal serial bus (USB) front-arrangement judging circuit |
CN103219033A (en) * | 2012-01-18 | 2013-07-24 | 百度在线网络技术(北京)有限公司 | Portable memory |
CN102662898B (en) * | 2012-04-06 | 2015-01-21 | 华为技术有限公司 | Host-slave compatibility method, device and system for USB (universal serial bus) device |
CN105335311A (en) * | 2014-07-04 | 2016-02-17 | 纬创资通股份有限公司 | Portable electronic device and power management method |
CN105068958B (en) * | 2015-08-13 | 2019-04-16 | 小米科技有限责任公司 | Method for handover control and device |
TWI575875B (en) * | 2015-10-29 | 2017-03-21 | 智原科技股份有限公司 | Flip-flop circuit |
CN107318037A (en) * | 2016-04-26 | 2017-11-03 | 宏碁股份有限公司 | Electronic installation and image transmission control method |
CN106066840A (en) * | 2016-05-27 | 2016-11-02 | 北京小鸟看看科技有限公司 | A kind of method switching electronic equipment master slave mode and a kind of electronic equipment |
KR20180002462A (en) * | 2016-06-29 | 2018-01-08 | 삼성전자주식회사 | Method for determing role of electronic device and electronic device thereof |
CN107818064B (en) * | 2016-09-14 | 2021-03-09 | 展汇科技股份有限公司 | Operation method of universal serial bus concentrator supporting master-slave conversion |
CN106445863A (en) * | 2016-09-28 | 2017-02-22 | 广州视睿电子科技有限公司 | Interface circuit |
CN106776428B (en) * | 2016-12-06 | 2020-05-08 | 广州视源电子科技股份有限公司 | Terminal device, read-write device, data transmission system and hardware initialization method |
CN106844276B (en) * | 2016-12-30 | 2020-04-28 | 深圳市广和通无线股份有限公司 | USB circuit |
DE102019126690A1 (en) | 2019-10-02 | 2021-04-08 | Phoenix Contact Gmbh & Co. Kg | METHOD FOR DATA TRANSFER BETWEEN A PERIPHERAL DEVICE AND A DATA COLLECTION UNIT, PERIPHERAL DEVICE AND DATA COLLECTION UNIT |
CN110618672A (en) | 2019-10-18 | 2019-12-27 | 深圳市道通科技股份有限公司 | Interface circuit and interface communication method and device thereof |
CN113419515A (en) * | 2021-06-22 | 2021-09-21 | 上海星融汽车科技有限公司 | Master-slave mode switching method, electronic equipment and vehicle diagnostic instrument |
CN114860520B (en) * | 2022-04-22 | 2023-03-21 | 珠海海奇半导体有限公司 | USB slave equipment extraction detection circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080263245A1 (en) * | 2007-04-20 | 2008-10-23 | Genesys Logic, Inc. | Otg device for multi-directionally transmitting gps data and controlling method of same |
US20100161842A1 (en) * | 2008-12-16 | 2010-06-24 | Lenovo (Beijing) Limited | Mobile terminal and switching method for controlling data transmission interface thereof |
-
2009
- 2009-07-29 CN CN2009103049697A patent/CN101989246A/en active Pending
-
2010
- 2010-02-04 US US12/699,899 patent/US8095714B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080263245A1 (en) * | 2007-04-20 | 2008-10-23 | Genesys Logic, Inc. | Otg device for multi-directionally transmitting gps data and controlling method of same |
US20100161842A1 (en) * | 2008-12-16 | 2010-06-24 | Lenovo (Beijing) Limited | Mobile terminal and switching method for controlling data transmission interface thereof |
Cited By (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110084651A1 (en) * | 2009-10-08 | 2011-04-14 | Audiovox Corporation | Charging station |
US20110227535A1 (en) * | 2010-03-22 | 2011-09-22 | Audiovox Corporation | Charge clip |
US8686683B2 (en) | 2010-03-22 | 2014-04-01 | Audiovox Corporation | Charge clip |
US20130326094A1 (en) * | 2010-11-24 | 2013-12-05 | Shanghai Actions Semiconductor Co., Ltd. | Usb device and detection method thereof |
US8793425B2 (en) * | 2010-11-24 | 2014-07-29 | Shanghai Actions Semiconductor Co., Ltd. | USB device and detection method thereof |
US9083192B2 (en) | 2011-07-07 | 2015-07-14 | Voxx International Corporation | Current selectable USB charger |
WO2013006753A1 (en) * | 2011-07-07 | 2013-01-10 | Voxx International Corporation | Current selectable usb charger |
US9312704B2 (en) | 2012-01-09 | 2016-04-12 | Voxx International Corporation | USB wall plate charger |
US9188325B2 (en) | 2012-01-09 | 2015-11-17 | Voxx International Corporation | Travel nightlight with USB charger |
USD734253S1 (en) | 2012-01-09 | 2015-07-14 | Voxx International Corporation | Housing for a USB wall plate charger |
US9166434B2 (en) | 2012-06-29 | 2015-10-20 | Intel Corporation | Universal charger |
CN102841877A (en) * | 2012-07-05 | 2012-12-26 | 深圳芯邦科技股份有限公司 | Detecting method and automatic detecting circuit of working mode |
US20140180618A1 (en) * | 2012-12-22 | 2014-06-26 | Hon Hai Precision Industry Co., Ltd. | Test device for testing startup function of electronic device |
TWI559122B (en) * | 2012-12-27 | 2016-11-21 | 英特爾公司 | Universal power interface |
US20140183974A1 (en) * | 2012-12-27 | 2014-07-03 | Wayne L. Proefrock | Universal power interface |
KR20150072447A (en) * | 2012-12-27 | 2015-06-29 | 인텔 코포레이션 | Universal power interface |
US9281699B2 (en) | 2012-12-27 | 2016-03-08 | Intel Corporation | Electronic device to be powered by alternative power source |
US9287702B2 (en) * | 2012-12-27 | 2016-03-15 | Intel Corporation | Universal power interface |
KR101654780B1 (en) * | 2012-12-27 | 2016-09-06 | 인텔 코포레이션 | Universal power interface |
US9184627B2 (en) | 2012-12-28 | 2015-11-10 | Intel Corporation | Charging system for electronic device |
EP3016363A4 (en) * | 2013-06-26 | 2017-02-08 | Huizhou TCL Mobile Communication Co., Ltd. | Communication module and terminal for realizing hot plug |
WO2015059654A1 (en) * | 2013-10-22 | 2015-04-30 | Allgo Embedded Systems Private Limited | Universal serial bus (usb) hub for switching downstream ports between host mode and slave mode |
US9910806B2 (en) | 2013-10-22 | 2018-03-06 | Allgo Embedded Systems Private Limited | Universal serial bus (USB) hub for switching downstream ports between host mode and slave mode |
US10528492B2 (en) * | 2015-04-23 | 2020-01-07 | Xi'an Zhongxing New Software Co., Ltd. | Circuit, method and apparatus for USB interface sharing |
US20180121373A1 (en) * | 2015-04-23 | 2018-05-03 | Zte Corporation | Circuit, Method and Apparatus for USB Interface Sharing |
US20170039155A1 (en) * | 2015-08-07 | 2017-02-09 | Xiaomi Inc. | Interface circuit, method and device for state switching |
US10210122B2 (en) * | 2015-08-07 | 2019-02-19 | Xiaomi Inc. | Interface circuit, method and device for state switching |
US20170177530A1 (en) * | 2015-12-21 | 2017-06-22 | Xiaomi Inc. | Method and apparatus for switching state |
US10572424B2 (en) * | 2015-12-21 | 2020-02-25 | Xiaomi Inc. | Method and apparatus for switching state |
US10162788B2 (en) * | 2016-08-19 | 2018-12-25 | Microchip Technology Incorporated | USB on the go (OTG) multi-hub endpoint reflector hub |
US11611452B2 (en) * | 2018-05-04 | 2023-03-21 | Continental Automotive Gmbh | Gateway for data communication in a vehicle |
US10714958B2 (en) | 2018-08-17 | 2020-07-14 | Chicony Power Technology Co., Ltd. | Charging apparatus and operating method thereof |
CN109344016A (en) * | 2018-08-31 | 2019-02-15 | 珠海全志科技股份有限公司 | Can the USB device switched between host and equipment mode and switching method |
US20200212640A1 (en) * | 2018-12-26 | 2020-07-02 | Dexin Electronic Ltd. | Peripheral device |
US11025020B2 (en) * | 2018-12-26 | 2021-06-01 | Dexin Electronic Ltd. | Peripheral device |
US11128126B2 (en) * | 2019-01-17 | 2021-09-21 | Hongfujin Precision Electronics (Zhengzhou) Co., Ltd. | Internal voltage-canceling circuit and USB device using the same |
TWI763968B (en) * | 2019-01-17 | 2022-05-11 | 鴻海精密工業股份有限公司 | Protection circuit and usb tranmission device using the same |
US11137932B2 (en) * | 2019-12-02 | 2021-10-05 | Western Digital Technologies, Inc. | Pad indication for device capability |
CN113505089A (en) * | 2021-07-27 | 2021-10-15 | 联想(北京)有限公司 | Electronic equipment and control method |
CN114064535A (en) * | 2021-11-15 | 2022-02-18 | 深圳市闪芯微电子有限公司 | USB chip and manufacturing method thereof |
CN117827716A (en) * | 2024-02-28 | 2024-04-05 | 苏州元脑智能科技有限公司 | Master-slave switching interface structure of server and application equipment thereof |
Also Published As
Publication number | Publication date |
---|---|
CN101989246A (en) | 2011-03-23 |
US8095714B2 (en) | 2012-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8095714B2 (en) | Electronic device capable of automatically switching between a master mode and a slave mode | |
US10153652B2 (en) | Charging system | |
US8344743B2 (en) | Testing system for power supply unit | |
US20130181660A1 (en) | Charge control circuit for usb device | |
US9407987B2 (en) | Audio interface self-adaptation device | |
TWI468920B (en) | Electronic device with power consumption detection function | |
US7582987B2 (en) | Double power sources switching circuit | |
US8147138B2 (en) | Power supply circuit for motherboard | |
US9183162B2 (en) | Electronic device capable of being debugged via earphone port | |
US20130268797A1 (en) | Power-off protection circuit and electronic device with power-off protection circuit | |
US20060015670A1 (en) | Apparatus for detecting connection of a peripheral unit to a host system | |
US20130257442A1 (en) | Power source detection circuit and electronic device with power source detection circuit | |
TW201107991A (en) | Electronic device capable of switching between a USB master and a USB slave mode automatically | |
KR20230016687A (en) | Data cables and charging devices | |
US20130283077A1 (en) | Wake-up circuit and electronic device | |
CN107333073B (en) | Prevent external image information source interface circuit of halting | |
US8148998B2 (en) | Orientation detection circuit and electronic device using the same | |
US8996894B2 (en) | Method of booting a motherboard in a server upon a successful power supply to a hard disk driver backplane | |
US20230032344A1 (en) | Touch display device and power supply control method | |
TW201301013A (en) | Electrical device | |
CN106888396B (en) | Separated television control circuit and method and separated television | |
CN212060420U (en) | Low-voltage servo power-down detection circuit | |
US9841797B2 (en) | Power supply switch apparatus | |
CN111404538B (en) | Connection circuit and connection method thereof | |
US20190251803A1 (en) | Ringer control device and ringer control method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUO, WEI;DU, ZHONG-WEI;REEL/FRAME:023895/0253 Effective date: 20100120 Owner name: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUO, WEI;DU, ZHONG-WEI;REEL/FRAME:023895/0253 Effective date: 20100120 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20160110 |